SOD1 and diabetes mellitus: Ma et al. [28], on the 14th day of their experiment, showed higher CAT and SOD activities in ulceration specimens derived from patients treated with HBO (twice daily for 90 minutes at 2.5 atm for 2 weeks) due to skin wound ulcers of the foot caused by diabetes, compared with such activities in people treated conventionally without the use of the hyperbaric chamber.